Automatic safety-valve for water-gages



(No Model.)

W. H. BRAY &'G. NIOKERSON.

AUTOMATIC SAFETY VALVE FOR WATER GAGES.

No. 399,735. Patented Mar; 19,1889.

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N. PETERS, Phol0-l.i\hog|:pher, Washington, l!v C.

llNiTEn STATES PATENT ,QFFICEQ H WILLIAM H. BRAY, OF BOSTON, AND CORNELIUS NIOKERSON, OF CHELSEA,

MASSACHUSETTS.

AUTOMATEC SAFETY-=VALVE FOR WATER-GAGES.

SPECIFICATION forming part of Letters Patent N0. 399,735, dated March 19, 1889.

Application filed January 10, 1889. Serial No. 295,980. (No model.)

To CLZZ whom it may concern:

Be it known that we, VILLIAM H. BRAY, of

Boston, in the county of Suffolk, and COR NELIUS NIoKERsoN, of Chelsea, in the county of Suffolk, State of ll'lassachusetts, have invented a certain new and useful Improvement in Automatic Safety-Valves for Gage- Oocks and IVater-Gageaof which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevation of a water-gage provided with our improvement represented as in use, the body of one of the valves being broken away and the boiler shown in vertical section; Fig. 2, an elevation of the inner end of the tube, the stop being removed; and Fig. 3, an elevation of the automatic valve removed.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

Our invention relates to valves for automatically closing the gage-cocks and watergages of steam-boilers when the glass breaks, or in case it becomes necessary to remove the main valve; and it consists in certain novel features, as hereinafter fully set forth and claimed, the object being to produce a simpler, cheaper, and more effective device than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A represents the boiler, B the body of the valves, and O the water-gage glass.

The bodies B of the valves are of the ordinary form and construction, excepting as hereinafter specified, and have their tubes 1) exteriorly screw-threaded to enable them to be illserted in the boiler. The glass 0 is secured to the valve-bodies in the usual manner. The main valve D is disposed in the valve-body, and is provided with a stem, cl, and handwheel, f. A ground valve-seat, g, is formed in said body to receive the valve. The valvetubes 5 are extended at 471, so as to project within the boiler, said extensions being provided with longitudinal slots h. A plug or stop, 1 is secured in the inner end of the tubeeXtension m by means of a pin, Z, said stop being provided with a central opening, 13. The automatic valve H is conical and fitted to slide in the extension m of the tube 1), a seat, 15, being formed in said tube to receive the valve. Proj ectin g outward from the valve H are horizon- 6o tallyarranged rods or arms '0, the outer ends of which engage the stop i and prevent the valve from being forced too far away from its seat t. A pin, 00, projects laterally from each side of the valve l-I through a slot, h, in the force the automatic valve back from its seat or into the position shown in Fig. 1. The main valves in the water-gage being gradually opened, said spindles will prevent the pressure of the water in the boiler from closing said automatic valves and permit it to flow into the glass O, when the pressure hecomes equal in front and behind said automatic valves, causing them to remain open. Should the glass 0 break or a valve-body be accidentally broken off, and thus relieve the pressure in front of the automatic valves, the pressure within the boiler will at once force them against their seats, thereby preventing the escape of water or steam from said boiler.

It will be seen that by the use of our improvement the main valve can be at any time removed from the valve-body when it becomes necessary to grind or rebabbitt it.

By forming the slots h in the tube-extension on scale or other deposits are'prevented from collecting in the automatic valve or its seat and interfering with their action. The arms prevent the spindle z from forcing the valve H so far that the pressure within the boiler would become too great in front of said valve An ordinary drip-valve, K, is se- 70 to prevent it automatically closing. The pins 00 prevent said valve from rotating-and its arms 1) from accidentally beingprojected through the slots h and interfering with the action thereof.

Having thus explained our invention, What We claim is 1. In a valve for Water-gages, the combination of a body provided With an exteriorlythreaded tube for securing it to the boiler, said tube projecting Within the boiler and pro vided with longitudinal slots, a stop in the outer end of said tube, an automatic valve fitted to slide in said tube and provided with rearWardly-projecting arms for engaging said stop, a seat for said valve, a main valve and seat in said body, and a spindle on said main valve for engaging the automatic valve, substantially as described.

2. In a valve for water-gages, the combination of a body provided with an exteriorlyscrew-threaded pipe projecting into the boiler, a main valve and seat in said body, a spindle on said valve projecting into said tube, longitudinal slots in said tube within the boiler, an automatic valve fitted to slide in said tube and provided with pins projecting through said slots, a seat for said valve, horizontal arms on the automatic valve, and a stop in the inner end of the tube for engagingsaid arms and preventing the valve from being forced too far from its seat, substantially as described.

3. In a valve for water-gages, the combination of a conical automatic valve fittedto slide in the main valve-tube, a seat for said valve, longitudinal slots in said tube, pins on said valve projecting through said slots, and rearWardly-projecting arms onsaid valve for engaging a stop in said tube, substantially as and for the purpose specified.

4. In a valve for'Water-gagesthe combination of the body B, provided with the threaded tube 1), having the slotted extension m, the main valve D,having the stem d and spindle z projecting into said tube, the conical valve H, fitted to slide in said tube-andprovided with pins 1*, projecting through the slots therein, the stops 1', the arms 1: on said conical valve, engaging said stop, and the seat 25, all being arranged to operate substantially as described.

WILLIAM H. BRAY. CORNELIUS N ICKERSON. Witnesses:

O. M. SHAW, K. DURFEE. 

